Hello, I am looking to purchase a new laptop with the following specs: CPU:Intel 2nd Generation Core i7 2670QM 2.2GHz (Turbo 3.1GHz) OS: Windows 7 Home Premium RAM: 16GB DDR3 HDD: 750GB SATA Graphics: Nvidia GT 540M 2GB Dedicated VGA Screen: 15.6” LED Screen Other: Bluetooth, 2MP Webcam, WiFi N, USB3.0, Blu-Ray Combo, HDMI, 6 Cell Battery (5200mAh) Before I purchase this laptop, I have a question to ask. How long with this 6 cell battery last? When being used without the charger, I plan to utilize the Internet, Microsoft Office, Google SketchUp and AutoCAD 2012 ONLY. Obviously, if the battery wont last that long utilizing these programs, I am best off considering another laptop. For this reason, it is important I know how long the battery will last. If anyone can help, it would be greatly appreciated. Thanks!